Knife cleaner



FIG. 1 is a front, right perspective view of our design for a knife cleaner;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a bottom, left perspective view thereof; and,

FIG. 7 is a perspective view showing our design in an environment of use.

The broken lines in the figures depict environment of the knife cleaner and form no part of the claimed design. 

CLAIM We claim the ornamental design for a knife cleaner, as shown and described. 